Pneumatic tire with three-dimensional cut

Abstract

Provided is an air tire with three-dimensional cuts, characterized by including at least one three-dimensional cut, and a tire including a tread and a shoulder formed on a side of the tread; the tread including at least one groove recessed toward a center of the tread and formed in a circumferential direction of the tire, at least one cut recessed toward the center of the tread and formed in a central axis direction of the tire, and at least one block divided by the at least one groove and the at least one cut recess; and the at least one three-dimensional cut inserted into the at least one cut recess and fixed between the at least one block.

Description

Technical Field

[0001] This invention relates to pneumatic tires with three-dimensional cutouts, and more specifically, to a pneumatic tire with three-dimensional cutouts for improving snow performance. Background Technology

[0002] A pneumatic tire includes: an airtight layer forming the interior of the tire; a carcass ply layer stacked on the outside of the airtight layer; a belt layer stacked on the outside of the carcass ply layer; a tread layer stacked on the outside of the belt layer; sidewalls forming both sides of the tire; and a bead attached to the sidewalls.

[0003] In addition, to achieve optimal ground contact, drainage, braking force, and noise dispersion, specific tread patterns are formed on the tire tread where it contacts the road surface. The shape of these patterns significantly impacts performance on wet and snowy roads, as well as handling; this is a primary factor in tire development. Kerfs are deep, transverse grooves, primarily less than 1mm wide, cut into the tread blocks to ensure a uniform contact surface, improve ground contact, and provide a cushioning effect for a comfortable ride. They also accelerate water drainage, thereby increasing traction and braking force.

[0004] Recently, the trend in tire tread design has shifted towards prioritizing performance over minimalist design and aesthetics. To improve tire performance, tread performance technology has been further subdivided and modified in subtle ways.

[0005] In addition, with snow tires, when rotating on the road surface, the edge effect generated by the cut is used for driving and braking, thereby ensuring snow performance when moving.

[0006] The slits used in snow tires to achieve the edge effect reduce the rigidity of the tread blocks, thus contributing to decreased tire performance on dry roads. To address this, three-dimensional slits are applied to improve the performance constrained by the slits in the vertical direction on the tire surface, ensuring the rigidity of the tread blocks. Typically, with respect to slits applied to snow tires, excessive tread block tilting or the leading part (the part that first contacts the road surface) winding into the road surface during snow tire operation often results in reduced friction with the road surface.

[0007] During driving, edge effects occur at the front of the tread blocks, while during braking, they occur at the rear (the last part to contact the road surface). This results in increased contact pressure compared to other parts of the tread block. When a water film or snow layer forms between the road surface and the tire, reducing the coefficient of friction, increased contact pressure can disrupt this film and improve the coefficient of friction. However, existing tread patterns reduce tread block rigidity with increasing tread density, and the contact pressure decreases with increased tread block slippage and contact area, leading to a reduced edge effect. Therefore, this may result in ineffective performance on wet or snowy surfaces or abnormal wear.

[0008] Patent Document 1: Korean Patent Publication No. 10-1739506 (May 18, 2017)

[0009] Patent Document 2: Korean Patent Publication No. 10-1711130 (February 22, 2017) Summary of the Invention

[0010] To address the problems described above, the present invention aims to provide an inflatable tire with a three-dimensional cut, wherein the three-dimensional cut, having a corrugated upper surface and a trapezoidal side surface, is inserted into a groove in the tire tread to improve snow performance.

[0011] In addition, to solve the problems mentioned above, the present invention aims to provide an inflatable tire with a three-dimensional cut, wherein at least one three-dimensional cut is inserted into at least one cut groove and is closely attached to and fixed between at least one tread block, thereby creating an interlocking phenomenon between the tread blocks, thereby improving the tire's ground contact, handling and braking performance.

[0012] The technical problem to be solved by the present invention is not limited to the technical problem mentioned above. Those skilled in the art can learn about other technical problems not mentioned based on the following description.

[0013] To achieve the objectives described above, the present invention provides a pneumatic tire with a three-dimensional cut, characterized in that it comprises: at least one three-dimensional cut, and a tire including a tread and a shoulder formed on the side of the tread; the tread includes: at least one groove recessed toward the center of the tread and formed along the circumferential direction of the tire, at least one cut groove recessed toward the center of the tread and formed along the central axis direction of the tire, and at least one tread block divided by the at least one groove and the at least one cut groove; the at least one three-dimensional cut is inserted into the at least one cut groove and is tightly fitted and fixed between the at least one tread block.

[0014] In an embodiment of the present invention, the three-dimensional cut comprises: a horizontal portion, including at least one horizontal component in the shape of a flat plate; a recessed portion, including at least one recessed component having a predetermined curvature and being recessed in one direction of the circumferential direction; and a protruding portion, including at least one protruding component having a predetermined curvature and being protruded in another direction of the circumferential direction; the horizontal portion, the recessed portion, and the protruding portion are continuously connected.

[0015] In an embodiment of the present invention, the horizontal portion comprises: a first horizontal component located inside one side of the notch groove, a second horizontal component combined with the first horizontal component, a third horizontal component located inside the other side of the notch groove, and a fourth horizontal component combined with the third horizontal component; the horizontal portion is closely attached to and fixed between a pair of adjacent patterned blocks in the at least one patterned block.

[0016] In an embodiment of the present invention, the recessed portion comprises: a first recessed component connected to the first horizontal component, and a second recessed component connected to the second horizontal component and coupled to the first recessed component; the protruding portion comprises: a first protruding component connected to the first recessed component, and a second protruding component connected to the second recessed component and coupled to the first protruding component; the first horizontal component, the first recessed component, and the first protruding component are sequentially connected, and the second horizontal component, the second recessed component, and the second protruding component are sequentially connected, wherein the shortest distance between the two ends of the first recessed component and the second recessed component is the same as the shortest distance between the two ends of the first protruding component and the second protruding component.

[0017] In an embodiment of the present invention, the protrusion comprises: a third protruding member connected to the third horizontal member, and a fourth protruding member connected to the fourth horizontal member and engaged with the third protruding member; the recess comprises: a third recessed member connected to the third protruding member, and a fourth recessed member connected to the fourth protruding member and engaged with the third recessed member; the third horizontal member, the third protruding member, and the third recessed member are sequentially connected, and the fourth horizontal member, the fourth protruding member, and the fourth recessed member are sequentially connected, and the shortest distance between the two ends of the third recessed member and the fourth recessed member is the same as the shortest distance between the two ends of the third protruding member and the fourth protruding member.

[0018] In an embodiment of the present invention, the shortest distance from one end of the first recessed component and the second recessed component connected to the first horizontal component and the second horizontal component to the other end of the first protruding component and the second protruding component is 5 mm to 12 mm.

[0019] In an embodiment of the present invention, the thickness of the three-dimensional cut is 0.2 to 0.4 mm.

[0020] In an embodiment of the present invention, the upper surface of the three-dimensional cut parallel to the surface of the tread has a corrugated shape that bends at least once alternately.

[0021] In an embodiment of the present invention, the side of the three-dimensional cut parallel to the at least one patterned block has a trapezoidal shape with alternating bends at least once, and the shortest distance from one end of the recessed portion in the side of the three-dimensional cut to one end of the protruding portion in the side of the three-dimensional cut is 2 mm to 3 mm.

[0022] Based on the above structure, the effect of the present invention is to improve snow performance by inserting a three-dimensional cut with a corrugated upper surface and a trapezoidal side surface into a cut groove in the tire tread.

[0023] Furthermore, according to the above structure, the effect of the present invention is that at least one three-dimensional cut is inserted into at least one cut groove and closely attached to and fixed between at least one tread block, thereby producing an interlocking phenomenon between the tread blocks, which can improve the tire's contact patch, handling, and braking performance.

[0024] The effects of this invention are not limited to those described above, but should be understood to include all effects that can be derived from the invention as described in the specification and claims of this invention. Attached Figure Description

[0025] Figure 1 This is a perspective view of an inflatable tire with three-dimensional cutouts, according to an embodiment of the present invention, in one direction.

[0026] Figure 2 It is Figure 1 The S region is shown in a magnified view of a local detail.

[0027] Figure 3 It is along Figure 2 A cross-sectional view along line ab.

[0028] Figure 4 (a) and (b) are perspective views showing the shape of the three-dimensional cut of an inflatable tire with a three-dimensional cut according to an embodiment of the present invention.

[0029] Figure 5 (a), (b), (c), and (d) are perspective views showing the actual shape of the three-dimensional cut of an inflatable tire with a three-dimensional cut according to an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures

[0031] 10: Tires and rims 11: Wheel rims

[0032] 12: Wheel disc 13: Wheel spokes

[0033] 100: Three-dimensional incision; 110: Horizontal section

[0034] 111: First horizontal component; 112: Second horizontal component

[0035] 113: Third horizontal component; 114: Fourth horizontal component

[0036] 120: Recessed portion; 121: First recessed component

[0037] 122: Second recessed component; 123: Third recessed component

[0038] 124: Fourth recessed component; 130: Protrusion.

[0039] 131: First protruding component; 132: Second protruding component

[0040] 133: Third protruding component; 134: Fourth protruding component

[0041] 200: Tire; 210: Tread

[0042] 211: Groove 212: Cut groove

[0043] 213: Patterned Block 213a: First Patterned Block

[0044] 213b: Second tread block; 220: Tire shoulder Detailed Implementation

[0045] The present invention will now be described with reference to the accompanying drawings. However, the present invention can be implemented in various different ways and is therefore not limited to the embodiments described herein. Furthermore, for the purpose of clearly illustrating the present invention, parts unrelated to the description have been omitted from the drawings, and similar reference numerals have been used to denote detailed parts throughout the specification.

[0046] Throughout the specification, when describing a part as "connected (joined, contacted, combined)" with another part, it includes not only "direct connection" but also "indirect connection" where they are separated by other components. Furthermore, when describing a part as "including" a structural element, unless otherwise stated, it indicates that other structural elements are not excluded, and that other structural elements may be included.

[0047] The terminology used in this specification is for illustrative purposes only and is not intended to limit the invention. Unless otherwise expressly indicated in the context, singular expressions include plural expressions. In this specification, terms such as "comprising" or "having" are used to indicate the presence of features, numbers, steps, actions, structural elements, components, or combinations thereof described in the specification, and should not be construed as excluding the presence or addability of one or more features, numbers, steps, actions, structural elements, components, or combinations thereof.

[0048] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0049] Figure 1 This is a perspective view of an inflatable tire with three-dimensional cutouts, according to an embodiment of the present invention, in one direction.

[0050] First, the tire 200 with the three-dimensional cutout 100 inserted and the tire wheel 10 supporting the tire 200 will be described.

[0051] Reference Figure 1 The tire 200 includes a tread 210 and a shoulder 220 formed on the side of the tread 210. Additionally, Figure 1 Although not shown in the diagram, tire 200 may contain belt layers, airtight layers, crown belt layers, tire carcass, bead, etc. These structural elements are common knowledge, so specific instructions are omitted.

[0052] The tread 210 includes grooves 211, cut grooves 212, and tread blocks 213.

[0053] The groove 211 is recessed towards the center of the tread 210 and is formed along the circumference of the tire 200, thereby performing a drainage function, and as Figure 1As shown, at least one ( Figure 1 (3 in the middle) Grooves 211.

[0054] The notch groove 212 is recessed towards the center of the tread 210 and is formed along the central axis of the tire 200. Figure 1 Based on this, if the tread 210 is formed longitudinally, then the notch groove 212 is formed transversely, and as... Figure 1 As shown, at least one ( Figure 1 (36) Cut grooves 212.

[0055] Furthermore, the shape of the notch groove 212 is not limited to Figure 1 The shape shown is formed in such a way that the three-dimensional cutout 100 described later can be inserted therein and fit snugly against at least one patterned block 213.

[0056] Therefore, at least one side of the patterned block 213 can be formed parallel to the side of the three-dimensional cutout 100.

[0057] Patterned blocks 213 are divided by at least one groove 211 and at least one notch 212, such as Figure 1 As shown, at least one ( Figure 1 There are 18 in the middle, and 57 wing-shaped patterned blocks (the first and second patterned blocks). Patterned block 213.

[0058] The patterned block 213 stops the vehicle by generating friction through contact with the road surface.

[0059] In this invention, for ease of explanation, any pair of patterned blocks among adjacent patterned blocks are indicated by reference numerals.

[0060] Any pair of patterned blocks mentioned above are the first patterned block 213a and the second patterned block 213b.

[0061] The first patterned block 213a and the second patterned block 213b are divided by the groove 211 and the notch groove 212, so that the distance between the first patterned block 213a and the second patterned block 213b is the distance corresponding to the portion where the notch groove 212 is formed.

[0062] The shoulder 220 is formed on the side of the tread 210, and when the tire 200 is mounted on the rim 10, the shoulder 220 is in close contact with the rim 10.

[0063] Reference Figure 1 The tire hub 10 includes: a cylindrical rim 11 with open sides; a disc 12 located in the center of the rim 11; and at least one spoke 13 connecting the rim 11 and the disc 12.

[0064] Below, refer to Figures 1 to 5 An embodiment of the present invention, an inflatable tire with three-dimensional cutouts, will be described.

[0065] Reference Figure 1 An embodiment of the present invention includes a pneumatic tire with a three-dimensional cutout, comprising a three-dimensional cutout 100 and a tire 200.

[0066] The three-dimensional cut 100 is fixed by being inserted into the cut groove 212 formed between a pair of adjacent patterned blocks, and at least one is formed so that it can be inserted into at least one cut groove 212.

[0067] The aforementioned at least one three-dimensional cut 100 is inserted into at least one cut groove 212 and is closely attached to and fixed between at least one tread block 213, thereby creating an interlocking phenomenon between the tread blocks and improving the tire 200's contact patch, handling, and braking performance.

[0068] The three-dimensional cutout 100 is made by bending any one of the following stainless steel materials (SUS304, SUS301, SUS420J2, SUS630). In addition to the stainless steel materials mentioned above, the three-dimensional cutout 100 can also be made by 3D printing any one of maraging steel, SUS630, and Ti powder.

[0069] In addition, the friction generated by the three-dimensional cut 100 varies depending on its shape, which will be explained in detail later.

[0070] Therefore, the three-dimensional cut 100 includes a horizontal portion 110, a recessed portion 120, and a protruding portion 130.

[0071] Figure 2 It is Figure 1 The S region is shown in a magnified view of a local detail.

[0072] The horizontal portion 110 is closely attached to and fixed between a pair of adjacent patterned blocks 213a and 213b in at least one patterned block 213.

[0073] Reference Figure 2 The horizontal portion 110 includes at least one horizontal component in the shape of a flat plate, namely a first horizontal component 111, a second horizontal component 112, a third horizontal component 113, and a fourth horizontal component 114.

[0074] The first horizontal component 111 is flat and located inside one side of the notch groove 212.

[0075] The second horizontal component 112 has the same shape and size as the first horizontal component 111, and the second horizontal component 112 is combined with the first horizontal component 111.

[0076] The third horizontal component 113 is flat and has the same shape and size as the first horizontal component 111 and the second horizontal component 112, and the third horizontal component 113 is located inside the other side of the notch groove 212.

[0077] The fourth horizontal member 114 has the same shape and size as the third horizontal member 113, and the fourth horizontal member 114 is combined with the third horizontal member 113.

[0078] by Figure 2 Based on this, the first horizontal component 111 and the second horizontal component 112 are located on the left side, and the third horizontal component 113 and the fourth horizontal component 114 are located on the right side.

[0079] The recess 120 has a defined curvature and is recessed in one direction along the circumference of the tire 200. This recess 120 includes at least one recessed component, namely a first recessed component 121, a second recessed component 122, a third recessed component 123, and a fourth recessed component 124.

[0080] like Figure 2 As shown, the first recessed component 121 is connected to the first horizontal component 111. More specifically, one side of the first recessed component 121 is connected to the other side of the first horizontal component 111, and the other side of the first recessed component 121 is connected to one side of the first protruding component 131.

[0081] In addition, such as Figure 2 As shown, the first recessed component 121 is recessed downward with a specified curvature.

[0082] At this time, the radius R1 of the first recessed part 121 is preferably 6.6021 mm, but is not limited to this.

[0083] The second recessed component 122 is connected to the second horizontal component 112 and is combined with the first recessed component 121. Specifically, one side of the second recessed component 122 is connected to the other side of the second horizontal component 112, and the other side of the second recessed component 122 is connected to one side of the second protruding component 132.

[0084] In addition, such as Figure 2 As shown, the second recessed component 122 is recessed downward with a specified curvature.

[0085] like Figure 2 As shown, the third recessed member 123 is connected to the third protruding member 133. Additionally, as... Figure 2 As shown, the third recessed component 123 is recessed downwards with a specified curvature.

[0086] At this time, the radius R1 of the third recessed component 123 is preferably 6.6021 mm, just like the first recessed component 121, but is not limited to this.

[0087] The fourth recessed member 124 is connected to the fourth protruding member 134 and is coupled to the third recessed member 123. Additionally, as... Figure 2 As shown, the fourth recessed component 124 is recessed downwards with a specified curvature.

[0088] The upper surface of the three-dimensional cut 100, which is parallel to the surface of the tread 210 described above, has a corrugated shape that bends at least once alternately.

[0089] Specifically, the first recessed component 121 and the second recessed component 122, the first protruding component 131 and the second protruding component 132, the third recessed component 123 and the fourth recessed component 124, and the third protruding component 133 and the fourth protruding component 134 are sequentially joined together, thereby forming an overall structure as follows: Figure 2 The wavy shape shown.

[0090] Figure 3 It is along Figure 2 A cross-sectional view along line ab.

[0091] The side of the three-dimensional cut 100, which is parallel to at least one patterned block 213, has a trapezoidal shape with at least one alternating bend.

[0092] Regarding the above features, as an example in Figure 3 The third recessed component 123 and the fourth recessed component 124 formed between the first patterned block 213a and the second patterned block 213b are shown and described in detail.

[0093] The thickness f of the three-dimensional cut 100 is 0.2 to 0.4 mm, preferably 0.4 mm. Figure 3 The thickness f corresponds to the thickness f of the third recessed component 123 and the fourth recessed component 124. In addition, the thickness f of the first horizontal component 111 and the second horizontal component 112, the third horizontal component 113 and the fourth horizontal component 114, the first recessed component 123 and the second recessed component 124, the first protruding component 131 and the second protruding component 132, the third protruding component 133 and the fourth protruding component 134 is also applicable.

[0094] Furthermore, the shortest distance j+j from one end of the concave portion of the three-dimensional cut 100 to one end of the protruding portion of the three-dimensional cut 100 is Figure 3 The shortest distance j between the two ends of the third recessed member 123 and the fourth recessed member 124 shown is twice the length of the distance j, which is 2 mm to 3 mm, preferably 2.4 mm.

[0095] in addition, Figure 3 The depth g of the third recessed component 123 and the fourth recessed component 124 is 7 mm.

[0096] Furthermore, the radius R2 of the curved portion of the fourth recessed component 124 is 0.4 mm, so as to... Figure 3 Based on this, the angle between the horizontal line in the left and right directions and the tangent of the third recessed component 123 is 30 degrees.

[0097] The protrusion 130 includes at least one protruding member 131, 132, 133 having a defined curvature and protruding in another direction in the circumferential direction of the tire 200.

[0098] The protrusion 130 includes a first protrusion 131, a second protrusion 132, a third protrusion 133, and a fourth protrusion 134.

[0099] The first protruding member 131 is connected to the first recessed member 121. Specifically, one side of the first protruding member 131 is connected to the other side of the first recessed member 121, and the other side of the first protruding member 131 is continuously connected to one side of the third recessed member 123.

[0100] In addition, the first protruding member 131 is formed in a manner with a specified curvature.

[0101] The second protruding member 132 is connected to the second recessed member 122 and is combined with the first protruding member 131. Specifically, one side of the second protruding member 132 is connected to the other side of the second recessed member 122, and the other side of the second protruding member 132 is continuously connected to one side of the fourth recessed member 124.

[0102] At this time, the second protruding member 132 is formed in a manner with a specified curvature. The radius R1 of the second protruding member 132 is preferably 6.6021 mm, just like the first recessed member 121 and the third recessed member 123, but is not limited to this.

[0103] The third protruding member 133 is connected to the third recessed member 123. Specifically, one side of the third protruding member 133 is connected to the other side of the third recessed member 123, and the other side of the third protruding member 133 is continuously connected to one side of the third horizontal member 113.

[0104] In addition, the third protruding member 133 is formed in a manner with a specified curvature.

[0105] The fourth protruding member 134 is connected to the fourth recessed member 124 and is combined with the third protruding member 133. Specifically, one side of the fourth protruding member 134 is connected to the other side of the fourth recessed member 124, and the other side of the fourth protruding member 134 is continuously connected to one side of the fourth horizontal member 114.

[0106] The aforementioned horizontal portion 110, recessed portion 120, and protruding portion 130 are continuously connected. Specifically, the first horizontal component 111 and the second horizontal component 112, the first recessed component 121 and the second recessed component 122, and the first protruding component 131 and the second protruding component 132 are connected in sequence. The shortest distance d1 between the two ends of the first recessed component 121 and the second recessed component 122 is the same as the shortest distance d2 between the two ends of the first protruding component 131 and the second protruding component 132, and both are 5.5 mm.

[0107] In addition, the third horizontal component 113 and the fourth horizontal component 114, the third protruding component 133 and the fourth protruding component 134, and the third recessed component 123 and the fourth recessed component 124 are connected in sequence. The shortest distance d3 between the two ends of the third recessed component 123 and the fourth recessed component 124 is the same as the shortest distance d4 between the two ends of the third protruding component 133 and the fourth protruding component 134, and both are 5.5mm.

[0108] Furthermore, the shortest distance d1+d2 from one end of the first recessed member 121 and the second recessed member 122 connected to the first horizontal member 111 and the second horizontal member 112 to the other end of the first protruding member 131 and the second protruding member 132 is 5mm to 12mm, preferably 11mm.

[0109] In addition, the shortest distance d3+d4 from the other end of the third protruding member 133 and the fourth protruding member 134 connected to the third horizontal member 113 and the fourth horizontal member 114 to one end of the third recessed member 123 and the fourth recessed member 124 is 5mm to 12mm, preferably 11mm.

[0110] Figure 4 (a) and (b) are perspective views showing the shape of the three-dimensional cut of an inflatable tire with a three-dimensional cut according to an embodiment of the present invention. Figure 5 (a), (b), (c), and (d) are perspective views showing the actual shape of the three-dimensional cut of an inflatable tire with a three-dimensional cut according to an embodiment of the present invention.

[0111] The three-dimensional cut 100 of the present invention causes an interlocking phenomenon between the tread blocks 213 on the tread pattern formed on the tread 210 of the tire 200, thereby improving the tire 200’s ground contact, handling and braking performance, and will generate different friction forces depending on its shape.

[0112] Therefore, in this invention, experiments were conducted using zigzag, trapezoidal, and wave shapes for the three-dimensional cutout 100. Figure 4(a) and (b) show the three-dimensional cutouts 100 in Z-shaped and trapezoidal shapes.

[0113] Figure 5 The diagram shows three-dimensional cuts of various shapes, including zigzag, trapezoid, wave-trapezoid, and semi-trapezoid, created to evaluate friction based on the shape of the three-dimensional cut 100 before application to a tire.

[0114] Figure 5 (a) shows a three-dimensional cutout in a zigzag shape on the tread 210 surface of tire 200, extending along the depth direction from the tread surface. Figure 5 (b) shows a trapezoidal three-dimensional cutout on the tread 210 surface of tire 200 along the depth direction. Figure 5 (c) shows a three-dimensional cutout on the surface of the tread 210 of the tire 200, which is designed in a wave shape and in a trapezoidal shape along the depth direction from the surface of the tread 210. Figure 5 (d) shows a three-dimensional cutout on the surface of the tread 210 of the tire 200, which is designed in a trapezoidal shape and in a semi-trapezoidal shape along the depth direction from the surface of the tread 210.

[0115] The experimental results described above are recorded in Tables 1 and 2.

[0116] [Table 1]

[0117]

[0118] In Table 1, Figure 5 The (a) zigzag shape, (b) trapezoid shape, (c) wave-trapezoid shape, and (d) trapezoid-semi-trapezoid shape were samples made from SUS304 sheet material by bending. Friction was evaluated for each of these samples. First, in the dry state, the magnitude of friction at the three-dimensional cut 100 was: wave-trapezoid shape > zigzag shape = trapezoid-semi-trapezoid shape > trapezoid shape. It was confirmed that the wave-trapezoid shape generated the greatest friction.

[0119] Next, in the wet state, the magnitude of the friction force of the three-dimensional cut 100 is: wave-trapezoid shape = trapezoid shape = zigzag shape > semi-trapezoidal shape. It can be confirmed that the friction force generated in the semi-trapezoidal shape is the smallest.

[0120] Finally, in the snow state, the magnitude of the friction force of the three-dimensional cut 100 is trapezoid shape > zigzag shape > wave-trapezoid shape > semi-trapezoidal shape, with the greatest friction force generated in the trapezoid shape.

[0121] The results of the friction evaluation show that the friction is greater when the shape is zigzag or trapezoidal. However, due to the complexity of the shape, the failure rate is higher when using SUS304 material for bending manufacturing.

[0122] Furthermore, the results of evaluating the design rigidity by manufacturing wave-trapezoid and semi-trapezoid shapes show that the rigidity of the wave-trapezoid shape is about 5% higher than that of the semi-trapezoid shape. Therefore, it was decided to use the three-dimensional cutout of the wave-trapezoid shape for the mold.

[0123] [Table 2]

[0124] Snow operations 100 108 Snow brakes 100 107.4 Snow Acceleration 100 105.3

[0125] Table 2 evaluates snow performance, with tire 200 being manufactured as an all-season 235 / 45R18V. The performance evaluation results show that snow handling improved by 8% compared to the standard cut, snow braking improved by 7.4%, and snow acceleration improved by 5.3%.

[0126] The above description of the invention is merely illustrative, and those skilled in the art will understand that other specific embodiments can be readily modified without altering the technical concept or essential features of the invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and are not intended to be limiting. For example, structural elements described as a single unit may be implemented in a distributed manner; similarly, structural elements described in a distributed manner may be implemented in a combined manner.

[0127] The scope of this invention is defined by the appended claims, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts are within the scope of this invention.

Claims

1. A pneumatic tire with three-dimensional slits, characterized in that, include: At least one three-dimensional cut, and A tire, including a tread and a shoulder formed on the side of the tread; The tread includes: At least one groove is recessed toward the center of the tread and formed along the circumferential direction of the tire. At least one slit groove, recessed toward the center of the tread and formed along the central axis of the tire, and At least one patterned block is divided by the at least one groove and the at least one cut groove; The at least one three-dimensional cut is inserted into the at least one cut groove and is tightly fitted and fixed between the at least one patterned block. The three-dimensional incision includes: The horizontal portion includes at least one horizontal component in the shape of a flat plate. The recessed portion includes at least one recessed component having a defined curvature and recessed in one direction of the circumferential direction, and The protrusion includes at least one protruding member having a defined curvature and protruding in another direction in the circumferential direction; The horizontal portion, the recessed portion, and the protruding portion are continuously connected. The upper surface of the three-dimensional cut has a corrugated shape, and the side surface of the three-dimensional cut has a trapezoidal shape.

2. The pneumatic tire with three-dimensional cutouts according to claim 1, characterized in that, The horizontal portion includes: The first horizontal component is located inside one side of the notched groove. The second horizontal component is combined with the first horizontal component. The third horizontal component is located inside the other side of the notched groove, and The fourth horizontal component is combined with the third horizontal component; The horizontal portion is closely attached to and fixed between a pair of adjacent patterned blocks in at least one patterned block.

3. The pneumatic tire with three-dimensional cutouts according to claim 2, characterized in that, The recess includes: The first recessed component is connected to the first horizontal component, and The second recessed component is connected to the second horizontal component and is coupled to the first recessed component; The protrusion includes: The first protruding component is connected to the first recessed component, and The second protruding component is connected to the second recessed component and is coupled to the first protruding component; The first horizontal component, the first recessed component, and the first protruding component are connected in sequence, and the second horizontal component, the second recessed component, and the second protruding component are connected in sequence. The shortest distance between the two ends of the first recessed component and the second recessed component is the same as the shortest distance between the two ends of the first protruding component and the second protruding component.

4. The pneumatic tire with three-dimensional cutouts according to claim 2, characterized in that, The protrusion includes: The third protruding component is connected to the third horizontal component, and The fourth protruding component is connected to the fourth horizontal component and is coupled to the third protruding component; The recess includes: The third recessed component is connected to the third protruding component, and The fourth recessed component is connected to the fourth protruding component and is coupled to the third recessed component; The third horizontal component, the third protruding component, and the third recessed component are connected in sequence, and the fourth horizontal component, the fourth protruding component, and the fourth recessed component are connected in sequence. The shortest distance between the two ends of the third recessed component and the fourth recessed component is the same as the shortest distance between the two ends of the third protruding component and the fourth protruding component.

5. The pneumatic tire with three-dimensional cutouts according to claim 3, characterized in that, The shortest distance from one end of the first recessed component and the second recessed component connected to the first horizontal component and the second horizontal component to the other end of the first protruding component and the second protruding component is 5mm to 12mm.

6. The pneumatic tire with three-dimensional cutouts according to claim 1, characterized in that, The thickness of the three-dimensional cut is 0.2 to 0.4 mm.

7. The pneumatic tire with three-dimensional cutouts according to claim 1, characterized in that, The shortest distance from one end of the recessed portion on the side of the three-dimensional cut to one end of the protruding portion on the side of the three-dimensional cut is 2mm to 3mm.

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